//-------------------- mContentLoader.js

var net = new Object();



net.READY_STATE_UNINITIALIZED= 0;

net.READY_STATE_LOADING      = 1;

net.READY_STATE_LOADED       = 2;

net.READY_STATE_INTERACTIVE  = 3;

net.READY_STATE_COMPLETE     = 4;



net.ContentLoader = function( component, url, method, requestParams ) {

   this.component     = component;

   this.url           = url;

   this.requestParams = requestParams;



   this.method        = method;

}



net.ContentLoader.prototype = {



   getTransport: function() {

      var transport;

      if ( window.XMLHttpRequest )

         transport = new XMLHttpRequest();

      else if ( window.ActiveXObject ) {

         try {

            transport = new ActiveXObject('Msxml2.XMLHTTP');

         }

         catch(err) {

            transport = new ActiveXObject('Microsoft.XMLHTTP');

         }

      }

      return transport;

   },



   sendRequest: function() {



      //if ( window.netscape && window.netscape.security.PrivilegeManager.enablePrivilege)

      //   netscape.security.PrivilegeManager.enablePrivilege('UniversalBrowserRead');



      var requestParams = []

      for ( var i = 0 ; i < arguments.length ;  i++ )

         requestParams.push(arguments[i]);



      var oThis = this;

      var request = this.getTransport();

      request.open( this.method, this.url, true );

      request.setRequestHeader( 'Content-Type', 'application/x-www-form-urlencoded');

      request.onreadystatechange = function() { oThis.handleAjaxResponse(request) };



      request.send( this.queryString(requestParams) );

  },



  queryString: function(args) {

// changes made by Filatei to accommodate 3 combo

//     var requestParams = [];

 //    for ( var i = 0 ; i < this.requestParams.length ; i++ )

//{

	   //     alert(this.requestParams);

  //      requestParams.push(this.requestParams[i]);

//}

	 var queryString = this.requestParams;

     for ( var j = 0 ; j < args.length ; j++ )

     {

         queryString += '&' + args[j];

//        requestParams.push(args[j]);

	}

    // var queryString = "";

     //if ( requestParams && requestParams.length > 0 ) {

       // for ( var i = 0 ; i < requestParams.length ; i++ ){



         //  queryString += requestParams[i] + '&';}

//        queryString = queryString.substring(0, queryString.length-1);

     //}



     return queryString;

  },



  handleAjaxResponse: function(request) {

     if ( request.readyState == net.READY_STATE_COMPLETE ) {

        if ( this.isSuccess(request) )

           this.component.ajaxUpdate(request);

        else

           this.component.handleError(request);

     }

  },



  isSuccess: function(request) {

    return  request.status == 0 

        || (request.status >= 200 && request.status < 300);

  }



};





//-------------------- mDoubleCombo.js



function DoubleCombo( masterId, slaveId, url, options ) {

   this.master     = document.getElementById(masterId);

   this.slave      = document.getElementById(slaveId);

   this.options    = options;

   this.ajaxHelper = new net.ContentLoader( this, url, "POST", options.requestParameters || [] );



   this.initializeBehavior();

}



DoubleCombo.prototype = {



   initializeBehavior: function() {

      var oThis = this;

      this.master.onchange = function() { oThis.masterComboChanged(); };

   },



   masterComboChanged: function() {

      var query = this.master.options[this.master.selectedIndex].value;
      this.ajaxHelper.sendRequest( 'query=' + query );

   },



   ajaxUpdate:  function(request) {

      var slaveOptions = this.createOptions(request.responseXML.documentElement);

      this.slave.length = 0;

      var optionsObj = this.slave.options;

      for ( var i = 0 ; i < slaveOptions.length ; i++ )

         optionsObj.add( slaveOptions[i] );

   },



   createOptions: function(ajaxResponse) {

      var newOptions = [];

      var entries = ajaxResponse.getElementsByTagName('entry');

      for ( var i = 0 ; i < entries.length ; i++ ) {

         var text  = this.getElementContent(entries[i],'optionText');

         var value = this.getElementContent(entries[i],'optionValue');

         newOptions.push( new Option(text, value) );

      }

      return newOptions;

   },



   handleError: function(request) {

      if ( this.options.errorHandler )

         this.options.errorHandler(request);

   },



   getElementContent: function(element,tagName) {

      var childElement = element.getElementsByTagName(tagName)[0];

      return childElement.text != undefined ? childElement.text : childElement.textContent;

   }



};